One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary information required to inform sustainable management plans. The need for information is critical in any attempt to ensure the sustainable use of the marine environment.
But what exactly is a an underwater survey... what does it look like? What do you do...? We realise that many people don't really know the answers to these questions.
Here we put together a short video that tries to give an insight... There is still plenty to be explained! But it sets the picture.
All out volunteers receive comprehensive training on the methods and techniques involved. You will be amazed how much you learn!

A Look at the LivingOceanFoundation's UnderwaterSurvey Methods
Using the M/YGoldenShadow as a research platform, research scientists implement standardized protocols to map, characterize, and evaluate coral reefs. The research involves comparing coral reefs across gradients of biodiversity, oceanographic conditions and human pressures to determine their status and major threats, and to identify key factors that enhance their health and resilience.
The LivingOceans Foundation looks at three main components when characterizing the health of a reef:
• We look at the fish (Fish Census);
• We look at what's on the bottom—that includes corals and other things (Benthic Survey); and
• We look at the corals (Belt Transect).
By learning how to conduct these types of surveys, you can make your own observations about aquatic resources near you. You may not live near a coral reef, but you can still use these methods to measure other important plants and animals that exist in habitats close to your home or school.

published:19 Oct 2012

views:5161

Spearfishing off CavoGreco,Cyprus can hear the Turkish ship "Barbaros" carrying out seismic surveys (illegally breaching the territorial waters of Cyprus). You can hear the first sound waves fired at 0:21 and subsequently every 10 seconds after that.
Definition of seismic surveying from wikipedia:
"Traditional marine seismic surveys are conducted using specially-equipped vessels that tow one or more cables containing a series of hydrophones at constant intervals....The seismic source, usually an airgun but other sources are available, is also deployed underneath the surface of the water and is located between the vessel and the first receiver. 2 sources are often used in order to achieve a fast rate of shooting....and the source is typically fired every 15 or 20 seconds.
http://en.wikipedia.org/wiki/File:Diagram_of_a_marine_seismic_survey.png

Underwater surveys show that the reef is more than 60% bleached (white/pink colonies), matching the extent of bleaching detected by aerial surveys in March 2016. MORE INFORMATION BELOW.
On 29th March 2016, aerial surveys of more than 500 coral reefs from Cairns to Papua New Guinea revealed that the most pristine section of the Great Barrier Reef experienced the worst mass bleaching event in its history, with the overwhelming majority of reefs being ranked in the most severe bleaching category. The surveys were conducted by ProfTerry Hughes from the ARCCentre of Excellence for Coral Reef Studies, convenor of the NationalCoral Bleaching Taskforce, and JamesKerry, project manager of the taskforce. Aerial surveys were completed with underwater survey or "ground truthing" to verify the severity of the bleaching observed from above.
Footage is free to use for editorial purposes but MUST be credited ARC Centre of Excellence for Coral Reef Studies / Andreas Dietzel.
---
What is coral bleaching? How does it affect the Great Barrier Reef?
http://www.coralcoe.org.au/resources/for-managers/coral-bleaching-and-the-great-barrier-reef
---
Hot news on the 2016 coral bleaching event:
20 April 2016: Only 7% of the Great Barrier Reef has avoided coral bleaching
http://www.coralcoe.org.au/media-releases/only-7-of-the-great-barrier-reef-has-avoided-coral-bleaching
15 April 2016: Great Barrier Reef risks losing tolerance to bleaching events
http://www.coralcoe.org.au/media-releases/great-barrier-reef-risks-losing-tolerance-to-bleaching-events
05 April 2016: National Coral Taskforce unleashes an armada of experts
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-unleashes-an-armada-of-experts
29 March 2016: Coral Bleaching Taskforce documents most severe bleaching on record
http://www.coralcoe.org.au/media-releases/coral-bleaching-taskforce-documents-most-severe-bleaching-on-record
21 March 2016: Scientist witnesses severe coral bleaching
http://www.coralcoe.org.au/media-releases/scientist-witnesses-severe-coral-bleaching
14 March 2016: National Coral Taskforce puts plan into effect as bleaching intensifies
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-puts-plan-into-effect-as-bleaching-intensifies
01 March 2016: National Coral Bleaching Taskforce keeping a close watch on the Reef
http://www.coralcoe.org.au/media-releases/national-coral-bleaching-taskforce-keeping-a-close-watch-on-the-reef

published:05 Apr 2016

views:4347

Two science divers (Chelsea and Alex) from California State University - Monterey Bay conducting a visual survey transect near the AquariusUnderwaterHabitat at 60'. For this project several divers and aquanauts were looking for and recording all social foraging events (when several fish forage for food together, whether from same species or mixed species) including the number of each species of fish involved, within a set distance from the transect line. This research was conducted as part of the Aquarius 2010 "If Reefs Could Talk" mission.

published:25 Mar 2011

views:1897

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to sea. An advanced exploration technique called seismic surveying is the first step to unlock this precious resource needed to ensure America's energy security.

published:20 Feb 2014

views:49275

It is now possible to see the underwater world in every detail thanks to the 3D ROV which is being deployed in the CalanqueNational Park, in the Mediterranean Sea, near the south of France.
The Park and other marine protected areas joined hands with Comex, a company specializing in underwater exploration and other underwater operations. Together they are developing a high definition 3D modeling technology.
In theCalanquesNational Parks, one of the objectives is to have a 3D model of protected marine habitats such as the canyons and underwater caves.
The 3D ROV will allow to do an inventory of the biodiversity around and have a benchmark to track any changes in order to adopt the appropriate measures of management.

published:20 Nov 2014

views:4362

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on a telescopic pole with a clamp.
The equipment can be put together in minutes by any field personnel. The camera can be setup to take HD video (1080 or 720p) or a series 5 Megapixel pictures (up to one every second).

Underwater

Extent

Three quarters of the planet Earth is covered by water. A majority of the planet's solid surface is abyssal plain, at depths between 4,000 and 5,500 metres (13,100 and 18,000ft) below the surface of the oceans. The solid surface location on the planet closest to the centre of the orb is the Challenger Deep, located in the Mariana Trench at a depth of 10,924 metres (35,840ft). Although a number of human activities are conducted underwater—such as research, scuba diving for work or recreation, or even underwater warfare with submarines, this very extensive environment on planet Earth is hostile to humans in many ways and therefore little explored. But it can be explored by sonar, or more directly via manned or autonomous submersibles. The ocean floors have been surveyed via sonar to at least a coarse resolution; particularly-strategic areas have been mapped in detail, in the name of detecting enemy submarines, or aiding friendly ones, though the resulting maps may still be classified.

Great Barrier Reef

The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400mi) over an area of approximately 344,400 square kilometres (133,000sqmi). The reef is located in the Coral Sea, off the coast of Queensland, Australia.

The Great Barrier Reef can be seen from outer space and is the world's biggest single structure made by living organisms. This reef structure is composed of and built by billions of tiny organisms, known as coralpolyps. It supports a wide diversity of life and was selected as a World Heritage Site in 1981.CNN labelled it one of the seven natural wonders of the world. The Queensland National Trust named it a state icon of Queensland.

International Year of Global Understanding (IYGU) by The International Council for Science (ICSU), the International Social Science Council (ISSC) & International Council for Philosophy and Human Sciences (CIPSH).

Understanding an Underwater Survey

One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary information required to inform sustainable management plans. The need for information is critical in any attempt to ensure the sustainable use of the marine environment.
But what exactly is a an underwater survey... what does it look like? What do you do...? We realise that many people don't really know the answers to these questions.
Here we put together a short video that tries to give an insight... There is still plenty to be explained! But it sets the picture.
All out volunteers receive comprehensive training on the methods and techniques involved. You will be amazed how much you learn!

Underwater Survey

underwater pipe survey by multibeam

8:26

How to Conduct a Coral Reef Survey

How to Conduct a Coral Reef Survey

How to Conduct a Coral Reef Survey

A Look at the LivingOceanFoundation's UnderwaterSurvey Methods
Using the M/YGoldenShadow as a research platform, research scientists implement standardized protocols to map, characterize, and evaluate coral reefs. The research involves comparing coral reefs across gradients of biodiversity, oceanographic conditions and human pressures to determine their status and major threats, and to identify key factors that enhance their health and resilience.
The LivingOceans Foundation looks at three main components when characterizing the health of a reef:
• We look at the fish (Fish Census);
• We look at what's on the bottom—that includes corals and other things (Benthic Survey); and
• We look at the corals (Belt Transect).
By learning how to conduct these types of surveys, you can make your own observations about aquatic resources near you. You may not live near a coral reef, but you can still use these methods to measure other important plants and animals that exist in habitats close to your home or school.

1:21

Hearing seismic surveying while underwater

Hearing seismic surveying while underwater

Hearing seismic surveying while underwater

Spearfishing off CavoGreco,Cyprus can hear the Turkish ship "Barbaros" carrying out seismic surveys (illegally breaching the territorial waters of Cyprus). You can hear the first sound waves fired at 0:21 and subsequently every 10 seconds after that.
Definition of seismic surveying from wikipedia:
"Traditional marine seismic surveys are conducted using specially-equipped vessels that tow one or more cables containing a series of hydrophones at constant intervals....The seismic source, usually an airgun but other sources are available, is also deployed underneath the surface of the water and is located between the vessel and the first receiver. 2 sources are often used in order to achieve a fast rate of shooting....and the source is typically fired every 15 or 20 seconds.
http://en.wikipedia.org/wiki/File:Diagram_of_a_marine_seismic_survey.png

Underwater Surveys using Sonar Imaging

Underwater surveys of the northern Great Barrier Reef during the 2016 coral bleaching event

Underwater surveys of the northern Great Barrier Reef during the 2016 coral bleaching event

Underwater surveys of the northern Great Barrier Reef during the 2016 coral bleaching event

Underwater surveys show that the reef is more than 60% bleached (white/pink colonies), matching the extent of bleaching detected by aerial surveys in March 2016. MORE INFORMATION BELOW.
On 29th March 2016, aerial surveys of more than 500 coral reefs from Cairns to Papua New Guinea revealed that the most pristine section of the Great Barrier Reef experienced the worst mass bleaching event in its history, with the overwhelming majority of reefs being ranked in the most severe bleaching category. The surveys were conducted by ProfTerry Hughes from the ARCCentre of Excellence for Coral Reef Studies, convenor of the NationalCoral Bleaching Taskforce, and JamesKerry, project manager of the taskforce. Aerial surveys were completed with underwater survey or "ground truthing" to verify the severity of the bleaching observed from above.
Footage is free to use for editorial purposes but MUST be credited ARC Centre of Excellence for Coral Reef Studies / Andreas Dietzel.
---
What is coral bleaching? How does it affect the Great Barrier Reef?
http://www.coralcoe.org.au/resources/for-managers/coral-bleaching-and-the-great-barrier-reef
---
Hot news on the 2016 coral bleaching event:
20 April 2016: Only 7% of the Great Barrier Reef has avoided coral bleaching
http://www.coralcoe.org.au/media-releases/only-7-of-the-great-barrier-reef-has-avoided-coral-bleaching
15 April 2016: Great Barrier Reef risks losing tolerance to bleaching events
http://www.coralcoe.org.au/media-releases/great-barrier-reef-risks-losing-tolerance-to-bleaching-events
05 April 2016: National Coral Taskforce unleashes an armada of experts
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-unleashes-an-armada-of-experts
29 March 2016: Coral Bleaching Taskforce documents most severe bleaching on record
http://www.coralcoe.org.au/media-releases/coral-bleaching-taskforce-documents-most-severe-bleaching-on-record
21 March 2016: Scientist witnesses severe coral bleaching
http://www.coralcoe.org.au/media-releases/scientist-witnesses-severe-coral-bleaching
14 March 2016: National Coral Taskforce puts plan into effect as bleaching intensifies
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-puts-plan-into-effect-as-bleaching-intensifies
01 March 2016: National Coral Bleaching Taskforce keeping a close watch on the Reef
http://www.coralcoe.org.au/media-releases/national-coral-bleaching-taskforce-keeping-a-close-watch-on-the-reef

3:16

Underwater Survey Transect

Underwater Survey Transect

Underwater Survey Transect

Two science divers (Chelsea and Alex) from California State University - Monterey Bay conducting a visual survey transect near the AquariusUnderwaterHabitat at 60'. For this project several divers and aquanauts were looking for and recording all social foraging events (when several fish forage for food together, whether from same species or mixed species) including the number of each species of fish involved, within a set distance from the transect line. This research was conducted as part of the Aquarius 2010 "If Reefs Could Talk" mission.

2:40

Offshore Seismic Surveying

Offshore Seismic Surveying

Offshore Seismic Surveying

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to sea. An advanced exploration technique called seismic surveying is the first step to unlock this precious resource needed to ensure America's energy security.

3:32

Innovative 3D underwater survey by ROV 3D

Innovative 3D underwater survey by ROV 3D

Innovative 3D underwater survey by ROV 3D

It is now possible to see the underwater world in every detail thanks to the 3D ROV which is being deployed in the CalanqueNational Park, in the Mediterranean Sea, near the south of France.
The Park and other marine protected areas joined hands with Comex, a company specializing in underwater exploration and other underwater operations. Together they are developing a high definition 3D modeling technology.
In theCalanquesNational Parks, one of the objectives is to have a 3D model of protected marine habitats such as the canyons and underwater caves.
The 3D ROV will allow to do an inventory of the biodiversity around and have a benchmark to track any changes in order to adopt the appropriate measures of management.

1:57

pole Cam Use for Shallow Underwater Surveys

pole Cam Use for Shallow Underwater Surveys

pole Cam Use for Shallow Underwater Surveys

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on a telescopic pole with a clamp.
The equipment can be put together in minutes by any field personnel. The camera can be setup to take HD video (1080 or 720p) or a series 5 Megapixel pictures (up to one every second).

underwater survey

underwater surveys 1

0:21

Portable Underwater Lidar System Equipment (PULSE)

Portable Underwater Lidar System Equipment (PULSE)

Portable Underwater Lidar System Equipment (PULSE)

Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technology to measure seabed topography in shallow waters. Such surveys are typically performed for beach replenishment studies, near-shore surveys, seafloor mapping, nautical chart updates, and coastal zone erosion monitoring. They are used in fields like oceanography, marine biology, oil and gas exploration, and coastal and reef management, as well as by the Coast Guard and the Armed Forces.
Airborne bathymetric lidar surveys use the interaction of different laser wavelengths with the seafloor to perform seabed profiling. But the lasers also interact with particles or sediments in suspension in the water column between the surface and the seabed. These interactions need to be considered when mapping the seabed, failing which errors in topographic elevations and hydrographic depths may occur.
INO has developed a submarine lidar to measure the reflectance of the seafloor and water column. The system is used to determine the reflectance of sea bottom so that their composition can be correlated with relative intensity data from aerial surveys. INO's lidar system helps to calibrate the results of airborne bathymetric surveys, increasing their accuracy and enhancing our understanding of the results. Use of bathymetric lidar systems is likely to increase in the future due to improvements in their functionality, so calibration of those systems is important to ensure accurate seabed topography data.
INO is working closely with INRS-ETE to test the maximum depth achievable and calibrate the system in the water. This lidar prototype has the potential to cover a range of 3 to 50 m underwater. The lidar submarine enclosure is currently carried by a zodiac and submerged while following airplanes doing aerial surveys. Future development of the lidar submarine system will include putting it in an Unmanned Underwater Vehicle (UUV) for independent measurements.
For more information : http://www.ino.ca/en-CA/Achievements/Description/project-p/portable-underwater-lidar-equipment.html

6:02

Underwater survey of ships

Underwater survey of ships

Underwater survey of ships

Company ''ASPTR''Ltd. has many years of experience in underwater ship survey. For example, our specialists have developed a unique method for measuring ship's rudder-propeller unit's gaps. Our divers survey the ship's underwater part with following detailed description of results, including photo and video materials. Upon finding damages or flaws, we carry out works to eliminate them, for example:
• winding of foreign matter on the rudder-propeller unit;
• replacement of anode protection;
• kingstone cleaning, replacement;
• cleaning, grinding and polishing the propeller.

Cave diving,,Underwater survey,,3D map,,cave divers Lebanon.

Understanding an Underwater Survey

One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary information required to inform sustainable management plans. The need for information is critical in any attempt to ensure the sustainable use of the marine environment.
But what exactly is a an underwater survey... what does it look like? What do you do...? We realise that many people don't really know the answers to these questions.
Here we put together a short video that tries to give an insight... There is still plenty to be explained! But it sets the picture.
All out volunteers receive comprehensive training on the methods and techniques involved. You will be amazed how much you learn!

published: 26 Aug 2016

Underwater Survey

underwater pipe survey by multibeam

published: 26 Mar 2013

How to Conduct a Coral Reef Survey

A Look at the LivingOceanFoundation's UnderwaterSurvey Methods
Using the M/YGoldenShadow as a research platform, research scientists implement standardized protocols to map, characterize, and evaluate coral reefs. The research involves comparing coral reefs across gradients of biodiversity, oceanographic conditions and human pressures to determine their status and major threats, and to identify key factors that enhance their health and resilience.
The LivingOceans Foundation looks at three main components when characterizing the health of a reef:
• We look at the fish (Fish Census);
• We look at what's on the bottom—that includes corals and other things (Benthic Survey); and
• We look at the corals (Belt Transect).
By learning how to conduct these types of surveys, you can make yo...

published: 19 Oct 2012

Hearing seismic surveying while underwater

Spearfishing off CavoGreco,Cyprus can hear the Turkish ship "Barbaros" carrying out seismic surveys (illegally breaching the territorial waters of Cyprus). You can hear the first sound waves fired at 0:21 and subsequently every 10 seconds after that.
Definition of seismic surveying from wikipedia:
"Traditional marine seismic surveys are conducted using specially-equipped vessels that tow one or more cables containing a series of hydrophones at constant intervals....The seismic source, usually an airgun but other sources are available, is also deployed underneath the surface of the water and is located between the vessel and the first receiver. 2 sources are often used in order to achieve a fast rate of shooting....and the source is typically fired every 15 or 20 seconds.
http://en.wikipe...

Underwater Survey Transect

Two science divers (Chelsea and Alex) from California State University - Monterey Bay conducting a visual survey transect near the AquariusUnderwaterHabitat at 60'. For this project several divers and aquanauts were looking for and recording all social foraging events (when several fish forage for food together, whether from same species or mixed species) including the number of each species of fish involved, within a set distance from the transect line. This research was conducted as part of the Aquarius 2010 "If Reefs Could Talk" mission.

published: 25 Mar 2011

Offshore Seismic Surveying

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to sea. An advanced exploration technique called seismic surveying is the first step to unlock this precious resource needed to ensure America's energy security.

published: 20 Feb 2014

Innovative 3D underwater survey by ROV 3D

It is now possible to see the underwater world in every detail thanks to the 3D ROV which is being deployed in the CalanqueNational Park, in the Mediterranean Sea, near the south of France.
The Park and other marine protected areas joined hands with Comex, a company specializing in underwater exploration and other underwater operations. Together they are developing a high definition 3D modeling technology.
In theCalanquesNational Parks, one of the objectives is to have a 3D model of protected marine habitats such as the canyons and underwater caves.
The 3D ROV will allow to do an inventory of the biodiversity around and have a benchmark to track any changes in order to adopt the appropriate measures of management.

published: 20 Nov 2014

pole Cam Use for Shallow Underwater Surveys

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on a telescopic pole with a clamp.
The equipment can be put together in minutes by any field personnel. The camera can be setup to take HD video (1080 or 720p) or a series 5 Megapixel pictures (up to one every second).

underwater survey

underwater surveys 1

published: 01 Jun 2015

Portable Underwater Lidar System Equipment (PULSE)

Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technology to measure seabed topography in shallow waters. Such surveys are typically performed for beach replenishment studies, near-shore surveys, seafloor mapping, nautical chart updates, and coastal zone erosion monitoring. They are used in fields like oceanography, marine biology, oil and gas exploration, and coastal and reef management, as well as by the Coast Guard and the Armed Forces.
Airborne bathymetric lidar surveys use the interaction of different laser wavelengths with the seafloor to perform seabed profiling. But the lasers also interact with particles or sediments in suspension in the water column between the surface and the ...

published: 11 Oct 2012

Underwater survey of ships

Company ''ASPTR''Ltd. has many years of experience in underwater ship survey. For example, our specialists have developed a unique method for measuring ship's rudder-propeller unit's gaps. Our divers survey the ship's underwater part with following detailed description of results, including photo and video materials. Upon finding damages or flaws, we carry out works to eliminate them, for example:
• winding of foreign matter on the rudder-propeller unit;
• replacement of anode protection;
• kingstone cleaning, replacement;
• cleaning, grinding and polishing the propeller.

Cave diving,,Underwater survey,,3D map,,cave divers Lebanon.

Understanding an Underwater Survey

One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary inf...

One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary information required to inform sustainable management plans. The need for information is critical in any attempt to ensure the sustainable use of the marine environment.
But what exactly is a an underwater survey... what does it look like? What do you do...? We realise that many people don't really know the answers to these questions.
Here we put together a short video that tries to give an insight... There is still plenty to be explained! But it sets the picture.
All out volunteers receive comprehensive training on the methods and techniques involved. You will be amazed how much you learn!

One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary information required to inform sustainable management plans. The need for information is critical in any attempt to ensure the sustainable use of the marine environment.
But what exactly is a an underwater survey... what does it look like? What do you do...? We realise that many people don't really know the answers to these questions.
Here we put together a short video that tries to give an insight... There is still plenty to be explained! But it sets the picture.
All out volunteers receive comprehensive training on the methods and techniques involved. You will be amazed how much you learn!

A Look at the LivingOceanFoundation's UnderwaterSurvey Methods
Using the M/YGoldenShadow as a research platform, research scientists implement standardized protocols to map, characterize, and evaluate coral reefs. The research involves comparing coral reefs across gradients of biodiversity, oceanographic conditions and human pressures to determine their status and major threats, and to identify key factors that enhance their health and resilience.
The LivingOceans Foundation looks at three main components when characterizing the health of a reef:
• We look at the fish (Fish Census);
• We look at what's on the bottom—that includes corals and other things (Benthic Survey); and
• We look at the corals (Belt Transect).
By learning how to conduct these types of surveys, you can make your own observations about aquatic resources near you. You may not live near a coral reef, but you can still use these methods to measure other important plants and animals that exist in habitats close to your home or school.

A Look at the LivingOceanFoundation's UnderwaterSurvey Methods
Using the M/YGoldenShadow as a research platform, research scientists implement standardized protocols to map, characterize, and evaluate coral reefs. The research involves comparing coral reefs across gradients of biodiversity, oceanographic conditions and human pressures to determine their status and major threats, and to identify key factors that enhance their health and resilience.
The LivingOceans Foundation looks at three main components when characterizing the health of a reef:
• We look at the fish (Fish Census);
• We look at what's on the bottom—that includes corals and other things (Benthic Survey); and
• We look at the corals (Belt Transect).
By learning how to conduct these types of surveys, you can make your own observations about aquatic resources near you. You may not live near a coral reef, but you can still use these methods to measure other important plants and animals that exist in habitats close to your home or school.

Spearfishing off CavoGreco,Cyprus can hear the Turkish ship "Barbaros" carrying out seismic surveys (illegally breaching the territorial waters of Cyprus). You can hear the first sound waves fired at 0:21 and subsequently every 10 seconds after that.
Definition of seismic surveying from wikipedia:
"Traditional marine seismic surveys are conducted using specially-equipped vessels that tow one or more cables containing a series of hydrophones at constant intervals....The seismic source, usually an airgun but other sources are available, is also deployed underneath the surface of the water and is located between the vessel and the first receiver. 2 sources are often used in order to achieve a fast rate of shooting....and the source is typically fired every 15 or 20 seconds.
http://en.wikipedia.org/wiki/File:Diagram_of_a_marine_seismic_survey.png

Spearfishing off CavoGreco,Cyprus can hear the Turkish ship "Barbaros" carrying out seismic surveys (illegally breaching the territorial waters of Cyprus). You can hear the first sound waves fired at 0:21 and subsequently every 10 seconds after that.
Definition of seismic surveying from wikipedia:
"Traditional marine seismic surveys are conducted using specially-equipped vessels that tow one or more cables containing a series of hydrophones at constant intervals....The seismic source, usually an airgun but other sources are available, is also deployed underneath the surface of the water and is located between the vessel and the first receiver. 2 sources are often used in order to achieve a fast rate of shooting....and the source is typically fired every 15 or 20 seconds.
http://en.wikipedia.org/wiki/File:Diagram_of_a_marine_seismic_survey.png

Underwater surveys of the northern Great Barrier Reef during the 2016 coral bleaching event

Underwater surveys show that the reef is more than 60% bleached (white/pink colonies), matching the extent of bleaching detected by aerial surveys in March 2016...

Underwater surveys show that the reef is more than 60% bleached (white/pink colonies), matching the extent of bleaching detected by aerial surveys in March 2016. MORE INFORMATION BELOW.
On 29th March 2016, aerial surveys of more than 500 coral reefs from Cairns to Papua New Guinea revealed that the most pristine section of the Great Barrier Reef experienced the worst mass bleaching event in its history, with the overwhelming majority of reefs being ranked in the most severe bleaching category. The surveys were conducted by ProfTerry Hughes from the ARCCentre of Excellence for Coral Reef Studies, convenor of the NationalCoral Bleaching Taskforce, and JamesKerry, project manager of the taskforce. Aerial surveys were completed with underwater survey or "ground truthing" to verify the severity of the bleaching observed from above.
Footage is free to use for editorial purposes but MUST be credited ARC Centre of Excellence for Coral Reef Studies / Andreas Dietzel.
---
What is coral bleaching? How does it affect the Great Barrier Reef?
http://www.coralcoe.org.au/resources/for-managers/coral-bleaching-and-the-great-barrier-reef
---
Hot news on the 2016 coral bleaching event:
20 April 2016: Only 7% of the Great Barrier Reef has avoided coral bleaching
http://www.coralcoe.org.au/media-releases/only-7-of-the-great-barrier-reef-has-avoided-coral-bleaching
15 April 2016: Great Barrier Reef risks losing tolerance to bleaching events
http://www.coralcoe.org.au/media-releases/great-barrier-reef-risks-losing-tolerance-to-bleaching-events
05 April 2016: National Coral Taskforce unleashes an armada of experts
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-unleashes-an-armada-of-experts
29 March 2016: Coral Bleaching Taskforce documents most severe bleaching on record
http://www.coralcoe.org.au/media-releases/coral-bleaching-taskforce-documents-most-severe-bleaching-on-record
21 March 2016: Scientist witnesses severe coral bleaching
http://www.coralcoe.org.au/media-releases/scientist-witnesses-severe-coral-bleaching
14 March 2016: National Coral Taskforce puts plan into effect as bleaching intensifies
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-puts-plan-into-effect-as-bleaching-intensifies
01 March 2016: National Coral Bleaching Taskforce keeping a close watch on the Reef
http://www.coralcoe.org.au/media-releases/national-coral-bleaching-taskforce-keeping-a-close-watch-on-the-reef

Underwater surveys show that the reef is more than 60% bleached (white/pink colonies), matching the extent of bleaching detected by aerial surveys in March 2016. MORE INFORMATION BELOW.
On 29th March 2016, aerial surveys of more than 500 coral reefs from Cairns to Papua New Guinea revealed that the most pristine section of the Great Barrier Reef experienced the worst mass bleaching event in its history, with the overwhelming majority of reefs being ranked in the most severe bleaching category. The surveys were conducted by ProfTerry Hughes from the ARCCentre of Excellence for Coral Reef Studies, convenor of the NationalCoral Bleaching Taskforce, and JamesKerry, project manager of the taskforce. Aerial surveys were completed with underwater survey or "ground truthing" to verify the severity of the bleaching observed from above.
Footage is free to use for editorial purposes but MUST be credited ARC Centre of Excellence for Coral Reef Studies / Andreas Dietzel.
---
What is coral bleaching? How does it affect the Great Barrier Reef?
http://www.coralcoe.org.au/resources/for-managers/coral-bleaching-and-the-great-barrier-reef
---
Hot news on the 2016 coral bleaching event:
20 April 2016: Only 7% of the Great Barrier Reef has avoided coral bleaching
http://www.coralcoe.org.au/media-releases/only-7-of-the-great-barrier-reef-has-avoided-coral-bleaching
15 April 2016: Great Barrier Reef risks losing tolerance to bleaching events
http://www.coralcoe.org.au/media-releases/great-barrier-reef-risks-losing-tolerance-to-bleaching-events
05 April 2016: National Coral Taskforce unleashes an armada of experts
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-unleashes-an-armada-of-experts
29 March 2016: Coral Bleaching Taskforce documents most severe bleaching on record
http://www.coralcoe.org.au/media-releases/coral-bleaching-taskforce-documents-most-severe-bleaching-on-record
21 March 2016: Scientist witnesses severe coral bleaching
http://www.coralcoe.org.au/media-releases/scientist-witnesses-severe-coral-bleaching
14 March 2016: National Coral Taskforce puts plan into effect as bleaching intensifies
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-puts-plan-into-effect-as-bleaching-intensifies
01 March 2016: National Coral Bleaching Taskforce keeping a close watch on the Reef
http://www.coralcoe.org.au/media-releases/national-coral-bleaching-taskforce-keeping-a-close-watch-on-the-reef

Two science divers (Chelsea and Alex) from California State University - Monterey Bay conducting a visual survey transect near the AquariusUnderwaterHabitat at 60'. For this project several divers and aquanauts were looking for and recording all social foraging events (when several fish forage for food together, whether from same species or mixed species) including the number of each species of fish involved, within a set distance from the transect line. This research was conducted as part of the Aquarius 2010 "If Reefs Could Talk" mission.

Two science divers (Chelsea and Alex) from California State University - Monterey Bay conducting a visual survey transect near the AquariusUnderwaterHabitat at 60'. For this project several divers and aquanauts were looking for and recording all social foraging events (when several fish forage for food together, whether from same species or mixed species) including the number of each species of fish involved, within a set distance from the transect line. This research was conducted as part of the Aquarius 2010 "If Reefs Could Talk" mission.

Offshore Seismic Surveying

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to ...

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to sea. An advanced exploration technique called seismic surveying is the first step to unlock this precious resource needed to ensure America's energy security.

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to sea. An advanced exploration technique called seismic surveying is the first step to unlock this precious resource needed to ensure America's energy security.

It is now possible to see the underwater world in every detail thanks to the 3D ROV which is being deployed in the CalanqueNational Park, in the Mediterranean Sea, near the south of France.
The Park and other marine protected areas joined hands with Comex, a company specializing in underwater exploration and other underwater operations. Together they are developing a high definition 3D modeling technology.
In theCalanquesNational Parks, one of the objectives is to have a 3D model of protected marine habitats such as the canyons and underwater caves.
The 3D ROV will allow to do an inventory of the biodiversity around and have a benchmark to track any changes in order to adopt the appropriate measures of management.

It is now possible to see the underwater world in every detail thanks to the 3D ROV which is being deployed in the CalanqueNational Park, in the Mediterranean Sea, near the south of France.
The Park and other marine protected areas joined hands with Comex, a company specializing in underwater exploration and other underwater operations. Together they are developing a high definition 3D modeling technology.
In theCalanquesNational Parks, one of the objectives is to have a 3D model of protected marine habitats such as the canyons and underwater caves.
The 3D ROV will allow to do an inventory of the biodiversity around and have a benchmark to track any changes in order to adopt the appropriate measures of management.

pole Cam Use for Shallow Underwater Surveys

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on ...

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on a telescopic pole with a clamp.
The equipment can be put together in minutes by any field personnel. The camera can be setup to take HD video (1080 or 720p) or a series 5 Megapixel pictures (up to one every second).

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on a telescopic pole with a clamp.
The equipment can be put together in minutes by any field personnel. The camera can be setup to take HD video (1080 or 720p) or a series 5 Megapixel pictures (up to one every second).

Portable Underwater Lidar System Equipment (PULSE)

Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technolog...

Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technology to measure seabed topography in shallow waters. Such surveys are typically performed for beach replenishment studies, near-shore surveys, seafloor mapping, nautical chart updates, and coastal zone erosion monitoring. They are used in fields like oceanography, marine biology, oil and gas exploration, and coastal and reef management, as well as by the Coast Guard and the Armed Forces.
Airborne bathymetric lidar surveys use the interaction of different laser wavelengths with the seafloor to perform seabed profiling. But the lasers also interact with particles or sediments in suspension in the water column between the surface and the seabed. These interactions need to be considered when mapping the seabed, failing which errors in topographic elevations and hydrographic depths may occur.
INO has developed a submarine lidar to measure the reflectance of the seafloor and water column. The system is used to determine the reflectance of sea bottom so that their composition can be correlated with relative intensity data from aerial surveys. INO's lidar system helps to calibrate the results of airborne bathymetric surveys, increasing their accuracy and enhancing our understanding of the results. Use of bathymetric lidar systems is likely to increase in the future due to improvements in their functionality, so calibration of those systems is important to ensure accurate seabed topography data.
INO is working closely with INRS-ETE to test the maximum depth achievable and calibrate the system in the water. This lidar prototype has the potential to cover a range of 3 to 50 m underwater. The lidar submarine enclosure is currently carried by a zodiac and submerged while following airplanes doing aerial surveys. Future development of the lidar submarine system will include putting it in an Unmanned Underwater Vehicle (UUV) for independent measurements.
For more information : http://www.ino.ca/en-CA/Achievements/Description/project-p/portable-underwater-lidar-equipment.html

Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technology to measure seabed topography in shallow waters. Such surveys are typically performed for beach replenishment studies, near-shore surveys, seafloor mapping, nautical chart updates, and coastal zone erosion monitoring. They are used in fields like oceanography, marine biology, oil and gas exploration, and coastal and reef management, as well as by the Coast Guard and the Armed Forces.
Airborne bathymetric lidar surveys use the interaction of different laser wavelengths with the seafloor to perform seabed profiling. But the lasers also interact with particles or sediments in suspension in the water column between the surface and the seabed. These interactions need to be considered when mapping the seabed, failing which errors in topographic elevations and hydrographic depths may occur.
INO has developed a submarine lidar to measure the reflectance of the seafloor and water column. The system is used to determine the reflectance of sea bottom so that their composition can be correlated with relative intensity data from aerial surveys. INO's lidar system helps to calibrate the results of airborne bathymetric surveys, increasing their accuracy and enhancing our understanding of the results. Use of bathymetric lidar systems is likely to increase in the future due to improvements in their functionality, so calibration of those systems is important to ensure accurate seabed topography data.
INO is working closely with INRS-ETE to test the maximum depth achievable and calibrate the system in the water. This lidar prototype has the potential to cover a range of 3 to 50 m underwater. The lidar submarine enclosure is currently carried by a zodiac and submerged while following airplanes doing aerial surveys. Future development of the lidar submarine system will include putting it in an Unmanned Underwater Vehicle (UUV) for independent measurements.
For more information : http://www.ino.ca/en-CA/Achievements/Description/project-p/portable-underwater-lidar-equipment.html

Underwater survey of ships

Company ''ASPTR''Ltd. has many years of experience in underwater ship survey. For example, our specialists have developed a unique method for measuring ship's r...

Company ''ASPTR''Ltd. has many years of experience in underwater ship survey. For example, our specialists have developed a unique method for measuring ship's rudder-propeller unit's gaps. Our divers survey the ship's underwater part with following detailed description of results, including photo and video materials. Upon finding damages or flaws, we carry out works to eliminate them, for example:
• winding of foreign matter on the rudder-propeller unit;
• replacement of anode protection;
• kingstone cleaning, replacement;
• cleaning, grinding and polishing the propeller.

Company ''ASPTR''Ltd. has many years of experience in underwater ship survey. For example, our specialists have developed a unique method for measuring ship's rudder-propeller unit's gaps. Our divers survey the ship's underwater part with following detailed description of results, including photo and video materials. Upon finding damages or flaws, we carry out works to eliminate them, for example:
• winding of foreign matter on the rudder-propeller unit;
• replacement of anode protection;
• kingstone cleaning, replacement;
• cleaning, grinding and polishing the propeller.

► Adventure Ocean Quest - Fragile Mediterranean (FULL Documentary)

The Mediterranean Sea is a world of impressive diversity where ocean sunfish and whales live side by side, and colourful corals provide a home for smaller creatures. But human beings have left their mark here for thousands of years: ancient shipwrecks and fighter planes from the Second World War litter the ocean floor, while until recently raw sewage was fed straight into the sea. The impact has been devastating – today the Mediterranean is an ecosystem on the edge. But there is a glimmer of hope as measures to protect the sea from pollution and excessive disturbance are being put into place.
Sandrine Ruiton from the University of Marseille specialises in research on artificial reefs to build up the lost marine biodiversity near cities like Marseille, one of the Mediterranean’s busiest po...

published: 13 Nov 2015

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170
In this video you will see what a 6 feet tall fish attractor look like in 10 feet of Burke Lake Park water, Recorded from RaymarineAxiom 9" multifunction display with RV100 3D transducer 4 in 1.
The newest software Update 3.3.170 released in January 2018 is showing the 7 rainbow color depth side bar every 50 feet and is repeating itself every 50 feet. So, 0 to 7 feet for Violet, Indigo 7-14 feet, 14-21 Blue, 21-28 green, Yellow 28-35, Orange 35-42, Red 42-50 feet. The colors repeat themselves when the depth is over 50 feet.

published: 13 Feb 2018

What Remote Viewers Found in Atlantis will Astound You

Remote viewers have found something astounding based on Google Earth surveys of anomalous underwater patterns found in two locations: the Atlantic waters off Morocco and Spain; and another off the coast of Antarctica. Learn the surprising details of how these two locations connect in a disaster believed to be the destruction of Atlantis. The remote viewers say that Atlantean society’s buildings were huge and were mostly built beneath ground. So now these huge buildings still exist, under the ocean floor and a bit of sediment. The RV’ers saw that some of the machinery was still intact and is still working to this day! However, they did not see that there are any people inside the buildings.
Courtney said that the Atlantean society was more than 100 years more advanced than ours. Their big...

published: 15 Mar 2018

Sea bed Survey by SeaLion 2 ROV

published: 07 Nov 2016

Leopard Darter Surveys

Go underwater and discover one of Oklahoma's unique fish and how the ODWC is helping bring back its numbers.

Submarines & Diving playlist: https://www.youtube.com/watch?v=abynac4hNYE&list=PL1C388CF94E3C0F45
US NavyTrainingFilm playlist: https://www.youtube.com/playlist?list=PLA40407C12E5E35A7
more at http://quickfound.net/links/military_news_and_links.htmlSubmarineSound and Vibration Measurement: Procedures for Airborne and Structureborne Noise Surveys.
US Navy Training Film MN-10312-D
Originally a public domain film from the US Navy, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original)....

published: 03 Jan 2018

Hangout With Explorer Clare Fieseler

Live from Smithsonian Institution’sCarrie Bowe Caye MarineFieldStation, BelizeFeaturing: NG Explorer & EcologistClareFieseler
The rate at which climate change is heating up coral reefs has no past analog. Deep reefs (>25m) are often proposed as spots of resilience, seeds of hope. This study addresses holes in that argument. Our project tests a popular yet unproven rule of thumb: deeper reefs should be conserved, given their potential as 1) a thermal safe haven and 2) a reproductive source within the larger reef matrix. We leverage three innovations. New temperature experiments are made possible because of an untapped dataset -- the Caribbean's only cross-depth temperature monitoring project. We examine, through experimentation, whether depth-stratified microenvironments, newly r...

Webinar: Underwater Sound in Relation to Dredging

The impacts of underwater sound on aquatic life have become a very important environmental issue. Like many other activities, the dredging process produces underwater sound depending on the type of dredger, operation methods and so on. The knowledge about dredging induced sound and its effects has increased greatly in recent years and it grows by the day. After a brief introduction to the subject in this webinar participants will learn about: effects of sound on marine life; dredging sound; documented impacts; management of sound impacts via mitigation measures. The presentation will build on the work of the WODA Expert Group on UnderwaterSound.

Seminar title: High-resolution benthic survey using Autonomous UnderwaterVehicles
Seminar type: CoralCoE seminar series
Presented by: StefanWilliamsDate: Thursday, 2nd of May2013Abstract: This talk will examine current developments in the area of benthic habitat mapping using Autonomous Underwater Vehicles (AUVs). An overview of Australia’sIntegratedMarine Observing System (IMOS) program will be given and the role that the IMOS AUVFacility is playing in conducting repeated surveys at sites around Australia will be described. We will provide a brief overview of developments in the areas of Simultaneous Localization and Mapping, 3D terrain reconstruction and management of the large volumes of image data being collected by these systems. We will show how these methods are being use...

Amazing find at Burke Lake on my RaymarineDragonfly 7" fish finder - a man-made underwater fish attractor (slide show and over 30 amazing fish sonar images at the end of the video. click here (20m04s) - I have been studying tips to catch a Musky fish (10,000 cast fish).
One of the tips is to understand the lake. so, I studied the Burke lake's contour map and brought my Raymarine Dragonfly 7" fish finder to the lake to study the underwater structure. Cliff, point and dropouts.
I have not found any videos on YOUTUBE to identify the underwater fish attractor at Burke Lake Park in Fairfax, Virginia at all, so enjoy watching it, subscribe more NEW AMAZING videos to come!!!
I found a HUGE man-made underwater fish attractor standing 6 feet tall in 10 feet of water from water column 4 feet de...

published: 23 Nov 2017

ROV SuBastian Dive 099- North Tafu Eruption - Underwater Fire

This is the fifteenth ROV dive and will explore the back-arc spreading axis north of Tafu cone. We will visit two young eruption sites, one constrained by before-and-after bathymetric surveys between 2010-2017, and the other between 2006-2009. We expect to see and sample young basalt lava and pyroclasts. There will also be opportunistic sampling vent fluids or biota if observed. More information on the expedition can be found here: https://schmidtocean.org/cruise/underwater-fire-studying-submarine-volcanoes-tonga/

Measuring the GreatestOceanDepthThe Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. In 2010 the United StatesCenter for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters (36,070 feet) below sea level with an estimated vertical accuracy of ± 40 meters. If Mount Everest, the highest mountain on Earth, were placed at this location it would be covered by over one mile of water.
The first depth measurements in the Mariana Trench were made by the British survey ship HMS Challenger, which was used by the Royal Navy in 1875 to conduct research in the trench. The greatest depth that they recorded at that time was 8,184 meters (26,850 feet).
In 1951, another Royal Navy vessel, also named the "HMS Challenger," returned to the area for additional measurements. They discovered an even deeper location with a depth of 10,900 meters (35,760 feet) determined by echo sounding. The Challenger Deep was named after the Royal Navy vessel that made these measurements.
In 2009, sonar mapping done by researchers aboard the RV Kilo Moana, operated by the University of Hawaii, determined the depth to be 10,971 meters (35,994 feet) with a potential error of ± 22 meters. The most recent measurement, done in 2010, is the 10,994 meter ( ± 40 meter accuracy) depth reported at the top of this article, measured by the United States Center for Coastal & Ocean Mapping.

Measuring the GreatestOceanDepthThe Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. In 2010 the United StatesCenter for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters (36,070 feet) below sea level with an estimated vertical accuracy of ± 40 meters. If Mount Everest, the highest mountain on Earth, were placed at this location it would be covered by over one mile of water.
The first depth measurements in the Mariana Trench were made by the British survey ship HMS Challenger, which was used by the Royal Navy in 1875 to conduct research in the trench. The greatest depth that they recorded at that time was 8,184 meters (26,850 feet).
In 1951, another Royal Navy vessel, also named the "HMS Challenger," returned to the area for additional measurements. They discovered an even deeper location with a depth of 10,900 meters (35,760 feet) determined by echo sounding. The Challenger Deep was named after the Royal Navy vessel that made these measurements.
In 2009, sonar mapping done by researchers aboard the RV Kilo Moana, operated by the University of Hawaii, determined the depth to be 10,971 meters (35,994 feet) with a potential error of ± 22 meters. The most recent measurement, done in 2010, is the 10,994 meter ( ± 40 meter accuracy) depth reported at the top of this article, measured by the United States Center for Coastal & Ocean Mapping.

► Adventure Ocean Quest - Fragile Mediterranean (FULL Documentary)

The Mediterranean Sea is a world of impressive diversity where ocean sunfish and whales live side by side, and colourful corals provide a home for smaller creat...

The Mediterranean Sea is a world of impressive diversity where ocean sunfish and whales live side by side, and colourful corals provide a home for smaller creatures. But human beings have left their mark here for thousands of years: ancient shipwrecks and fighter planes from the Second World War litter the ocean floor, while until recently raw sewage was fed straight into the sea. The impact has been devastating – today the Mediterranean is an ecosystem on the edge. But there is a glimmer of hope as measures to protect the sea from pollution and excessive disturbance are being put into place.
Sandrine Ruiton from the University of Marseille specialises in research on artificial reefs to build up the lost marine biodiversity near cities like Marseille, one of the Mediterranean’s busiest ports. Until recently it was responsible for seriously polluting the surrounding Mediterranean Sea. ChristianPetron himself has been instrumental in raising awareness of this ecosystem in dire straights. His own 30-year-old archive footage shows the extent of the pollution in graphic detail.
Both Sandrine Ruiton and Christian are involved in the hugely successful ‘PradoReef2006’ project, which is designed to repopulate the local waters by encouraging the colonisation of new reefs. Even old shipwrecks and fighter planes turned into artificial reefs and first indications offer grounds for cautious optimism.
But to be able to accurately assess the success of these artificial reefs, detailed population counts are absolutely essential. But their accuracy is questionable when carried out by divers with conventional equipment – reef creatures are notoriously shy and many are likely to hide at the approach of a noisy diver. So Sandrine Ruiton wants to find out if Frederic can achieve more accurate population counts on these fragile reefs by being less intrusive. His ability to move and behave almost like a fish without any cumbersome diving equipment allows him closer access without frightening the wildlife off.
His first destination is the wreck of an freighter, sunk after world-war 2, closely followed and observed by Christian Petron. The collection of creatures found here are delicate and extremely cautious. But this dive also poses real challenges for Fred: diving in a wreck brings particular dangers with it, especially for a freediver. Nevertheless, he is determined to press on with his attempt to evaluate the state of Mediterranean marine wildlife.
The artificial reef population surveys are only part of the reason why Frederic has come to the Mediterranean. He also works together with Dr. Pierre Chevaldonne, a scientist at the ‘StationMarine D’Endoume/Marseille’. Both are interested in an underwater cave that could be invaluable to modern science.
Organisms and animals that are usually associated with much deeper waters thrive in this deep dark cave. In particular a collection of sponges could be of interest, not just because they provide an endless supply of biomarkers that are very sensitive to environmental changes: they are also highly relevant for modern medicine. Sponges are known to provide AZT (Azido-Thymidin) – currently one of the most used medications for the treatment of AIDS and in the fight against cancer. The sponges generate these substances as dangerous chemical weapons against predators or as a defence against harmful bacteria.
The research team is renowned for their work on sponges, but the breathing bubbles emitted by conventional drivers would collect at the cave ceiling and gradually kill the cave dwellers.
But Frederic’s approach is very different. By holding his breath, he can ensure that the sponges and other cave organisms are not threatened. He is able to explore the cave in detail and report his findings and bring samples back to the research group. This research can provide ground-breaking insights into modern medicine, as well as giving an indication of the health of the Mediterranean waters by examining the sponges’ biomarkers.
Together, Frederic’s involvement in the artificial reef projects as well as the underwater cave exploration are extremely valuable contributions to the quest to document and protect the diversity of Mediterranean marine wildlife. He is in a unique position to access and approach the wildlife, that cannot be replicated by using conventional diving methods, and as such is an incredible opportunity for the scientists to gain a new window to the underwater life of the Mediterranean.

The Mediterranean Sea is a world of impressive diversity where ocean sunfish and whales live side by side, and colourful corals provide a home for smaller creatures. But human beings have left their mark here for thousands of years: ancient shipwrecks and fighter planes from the Second World War litter the ocean floor, while until recently raw sewage was fed straight into the sea. The impact has been devastating – today the Mediterranean is an ecosystem on the edge. But there is a glimmer of hope as measures to protect the sea from pollution and excessive disturbance are being put into place.
Sandrine Ruiton from the University of Marseille specialises in research on artificial reefs to build up the lost marine biodiversity near cities like Marseille, one of the Mediterranean’s busiest ports. Until recently it was responsible for seriously polluting the surrounding Mediterranean Sea. ChristianPetron himself has been instrumental in raising awareness of this ecosystem in dire straights. His own 30-year-old archive footage shows the extent of the pollution in graphic detail.
Both Sandrine Ruiton and Christian are involved in the hugely successful ‘PradoReef2006’ project, which is designed to repopulate the local waters by encouraging the colonisation of new reefs. Even old shipwrecks and fighter planes turned into artificial reefs and first indications offer grounds for cautious optimism.
But to be able to accurately assess the success of these artificial reefs, detailed population counts are absolutely essential. But their accuracy is questionable when carried out by divers with conventional equipment – reef creatures are notoriously shy and many are likely to hide at the approach of a noisy diver. So Sandrine Ruiton wants to find out if Frederic can achieve more accurate population counts on these fragile reefs by being less intrusive. His ability to move and behave almost like a fish without any cumbersome diving equipment allows him closer access without frightening the wildlife off.
His first destination is the wreck of an freighter, sunk after world-war 2, closely followed and observed by Christian Petron. The collection of creatures found here are delicate and extremely cautious. But this dive also poses real challenges for Fred: diving in a wreck brings particular dangers with it, especially for a freediver. Nevertheless, he is determined to press on with his attempt to evaluate the state of Mediterranean marine wildlife.
The artificial reef population surveys are only part of the reason why Frederic has come to the Mediterranean. He also works together with Dr. Pierre Chevaldonne, a scientist at the ‘StationMarine D’Endoume/Marseille’. Both are interested in an underwater cave that could be invaluable to modern science.
Organisms and animals that are usually associated with much deeper waters thrive in this deep dark cave. In particular a collection of sponges could be of interest, not just because they provide an endless supply of biomarkers that are very sensitive to environmental changes: they are also highly relevant for modern medicine. Sponges are known to provide AZT (Azido-Thymidin) – currently one of the most used medications for the treatment of AIDS and in the fight against cancer. The sponges generate these substances as dangerous chemical weapons against predators or as a defence against harmful bacteria.
The research team is renowned for their work on sponges, but the breathing bubbles emitted by conventional drivers would collect at the cave ceiling and gradually kill the cave dwellers.
But Frederic’s approach is very different. By holding his breath, he can ensure that the sponges and other cave organisms are not threatened. He is able to explore the cave in detail and report his findings and bring samples back to the research group. This research can provide ground-breaking insights into modern medicine, as well as giving an indication of the health of the Mediterranean waters by examining the sponges’ biomarkers.
Together, Frederic’s involvement in the artificial reef projects as well as the underwater cave exploration are extremely valuable contributions to the quest to document and protect the diversity of Mediterranean marine wildlife. He is in a unique position to access and approach the wildlife, that cannot be replicated by using conventional diving methods, and as such is an incredible opportunity for the scientists to gain a new window to the underwater life of the Mediterranean.

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170
In this video you will see what a 6 feet tall fish attractor...

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170
In this video you will see what a 6 feet tall fish attractor look like in 10 feet of Burke Lake Park water, Recorded from RaymarineAxiom 9" multifunction display with RV100 3D transducer 4 in 1.
The newest software Update 3.3.170 released in January 2018 is showing the 7 rainbow color depth side bar every 50 feet and is repeating itself every 50 feet. So, 0 to 7 feet for Violet, Indigo 7-14 feet, 14-21 Blue, 21-28 green, Yellow 28-35, Orange 35-42, Red 42-50 feet. The colors repeat themselves when the depth is over 50 feet.

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170
In this video you will see what a 6 feet tall fish attractor look like in 10 feet of Burke Lake Park water, Recorded from RaymarineAxiom 9" multifunction display with RV100 3D transducer 4 in 1.
The newest software Update 3.3.170 released in January 2018 is showing the 7 rainbow color depth side bar every 50 feet and is repeating itself every 50 feet. So, 0 to 7 feet for Violet, Indigo 7-14 feet, 14-21 Blue, 21-28 green, Yellow 28-35, Orange 35-42, Red 42-50 feet. The colors repeat themselves when the depth is over 50 feet.

Remote viewers have found something astounding based on Google Earth surveys of anomalous underwater patterns found in two locations: the Atlantic waters off Morocco and Spain; and another off the coast of Antarctica. Learn the surprising details of how these two locations connect in a disaster believed to be the destruction of Atlantis. The remote viewers say that Atlantean society’s buildings were huge and were mostly built beneath ground. So now these huge buildings still exist, under the ocean floor and a bit of sediment. The RV’ers saw that some of the machinery was still intact and is still working to this day! However, they did not see that there are any people inside the buildings.
Courtney said that the Atlantean society was more than 100 years more advanced than ours. Their biggest problem was that their scientists were doing things (experiments and such) in secrecy instead of in view of the public and officials. He called this “cloaked science”, and in fact states that we are doing the exact same thing now. He says that we are the descendants of the Atlanteans.

Remote viewers have found something astounding based on Google Earth surveys of anomalous underwater patterns found in two locations: the Atlantic waters off Morocco and Spain; and another off the coast of Antarctica. Learn the surprising details of how these two locations connect in a disaster believed to be the destruction of Atlantis. The remote viewers say that Atlantean society’s buildings were huge and were mostly built beneath ground. So now these huge buildings still exist, under the ocean floor and a bit of sediment. The RV’ers saw that some of the machinery was still intact and is still working to this day! However, they did not see that there are any people inside the buildings.
Courtney said that the Atlantean society was more than 100 years more advanced than ours. Their biggest problem was that their scientists were doing things (experiments and such) in secrecy instead of in view of the public and officials. He called this “cloaked science”, and in fact states that we are doing the exact same thing now. He says that we are the descendants of the Atlanteans.

Submarines & Diving playlist: https://www.youtube.com/watch?v=abynac4hNYE&list=PL1C388CF94E3C0F45
US NavyTrainingFilm playlist: https://www.youtube.com/playlist?list=PLA40407C12E5E35A7
more at http://quickfound.net/links/military_news_and_links.htmlSubmarineSound and Vibration Measurement: Procedures for Airborne and Structureborne Noise Surveys.
US Navy Training Film MN-10312-D
Originally a public domain film from the US Navy, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Sound_level_meter
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A sound level meter is used for acoustic (sound that travels through air) measurements. It is commonly a hand-held instrument with a microphone. The diaphragm of the microphone responds to changes in air pressure caused by sound waves. That is why the instrument is sometimes referred to as a Sound Pressure Level (SPL) Meter. This movement of the diaphragm, i.e. the sound pressure deviation (pascal Pa), is converted into an electrical signal (volts V).
A microphone is distinguishable by the voltage value produced when a known, constant sound pressure is applied. This is known as the microphone sensitivity. The instrument needs to know the sensitivity of the particular microphone being used. Using this information, the instrument is able to accurately convert the electrical signal back to a sound pressure, and display the resulting sound pressure level (decibels dB SPL).
Sound level meters are commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental and aircraft noise. The current international standard that specifies sound level meter functionality and performances is the IEC 61672-1:2013. However, the reading from a sound level meter does not correlate well to human-perceived loudness, which is better measured by a loudness meter. Specific loudness is a compressive nonlinearity that depends on level and also frequency, which can be calculated in a number of different ways...
https://en.wikipedia.org/wiki/Sound_intensity
Sound intensity also known as acoustic intensity is defined as the power carried by sound waves per unit area in a direction perpendicular to that area. The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2). One application is the noise measurement of sound intensity in the air at a listener's location as a sound energy quantity.
Sound intensity is not the same physical quantity as sound pressure. Hearing is directly sensitive to sound pressure which is related to sound intensity. In consumer audio electronics, the level differences are called "intensity" differences, but sound intensity is a specifically defined quantity and cannot be sensed by a simple microphone. The rate at which sound energy passes through a unit area held perpendicular to the direction of propagation of sound waves is called intensity of sound...
https://en.wikipedia.org/wiki/Anti-submarine_warfare
Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage or destroy enemy submarines.
Successful anti-submarine warfare depends on a mix of sensor and weapon technology, training, and experience. Sophisticated sonar equipment for first detecting, then classifying, locating and tracking the target submarine is a key element of ASW. To destroy submarines both the torpedo and mine are used, launched from air, surface and underwater platforms...

Submarines & Diving playlist: https://www.youtube.com/watch?v=abynac4hNYE&list=PL1C388CF94E3C0F45
US NavyTrainingFilm playlist: https://www.youtube.com/playlist?list=PLA40407C12E5E35A7
more at http://quickfound.net/links/military_news_and_links.htmlSubmarineSound and Vibration Measurement: Procedures for Airborne and Structureborne Noise Surveys.
US Navy Training Film MN-10312-D
Originally a public domain film from the US Navy, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Sound_level_meter
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A sound level meter is used for acoustic (sound that travels through air) measurements. It is commonly a hand-held instrument with a microphone. The diaphragm of the microphone responds to changes in air pressure caused by sound waves. That is why the instrument is sometimes referred to as a Sound Pressure Level (SPL) Meter. This movement of the diaphragm, i.e. the sound pressure deviation (pascal Pa), is converted into an electrical signal (volts V).
A microphone is distinguishable by the voltage value produced when a known, constant sound pressure is applied. This is known as the microphone sensitivity. The instrument needs to know the sensitivity of the particular microphone being used. Using this information, the instrument is able to accurately convert the electrical signal back to a sound pressure, and display the resulting sound pressure level (decibels dB SPL).
Sound level meters are commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental and aircraft noise. The current international standard that specifies sound level meter functionality and performances is the IEC 61672-1:2013. However, the reading from a sound level meter does not correlate well to human-perceived loudness, which is better measured by a loudness meter. Specific loudness is a compressive nonlinearity that depends on level and also frequency, which can be calculated in a number of different ways...
https://en.wikipedia.org/wiki/Sound_intensity
Sound intensity also known as acoustic intensity is defined as the power carried by sound waves per unit area in a direction perpendicular to that area. The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2). One application is the noise measurement of sound intensity in the air at a listener's location as a sound energy quantity.
Sound intensity is not the same physical quantity as sound pressure. Hearing is directly sensitive to sound pressure which is related to sound intensity. In consumer audio electronics, the level differences are called "intensity" differences, but sound intensity is a specifically defined quantity and cannot be sensed by a simple microphone. The rate at which sound energy passes through a unit area held perpendicular to the direction of propagation of sound waves is called intensity of sound...
https://en.wikipedia.org/wiki/Anti-submarine_warfare
Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage or destroy enemy submarines.
Successful anti-submarine warfare depends on a mix of sensor and weapon technology, training, and experience. Sophisticated sonar equipment for first detecting, then classifying, locating and tracking the target submarine is a key element of ASW. To destroy submarines both the torpedo and mine are used, launched from air, surface and underwater platforms...

Live from Smithsonian Institution’sCarrie Bowe Caye MarineFieldStation, BelizeFeaturing: NG Explorer & EcologistClareFieseler
The rate at which climate change is heating up coral reefs has no past analog. Deep reefs (>25m) are often proposed as spots of resilience, seeds of hope. This study addresses holes in that argument. Our project tests a popular yet unproven rule of thumb: deeper reefs should be conserved, given their potential as 1) a thermal safe haven and 2) a reproductive source within the larger reef matrix. We leverage three innovations. New temperature experiments are made possible because of an untapped dataset -- the Caribbean's only cross-depth temperature monitoring project. We examine, through experimentation, whether depth-stratified microenvironments, newly revealed through this dataset, condition some corals to be more climate-hardy. Secondly, mosaic-imaging surveys will visualize an underwater reef slope by integrating multi-perspective, high-resolution still images. In addition to creating stunning visuals, mosaic images capture the broad ecological patterns we believe hold the key to assessing resilience. Finally, we experiment with QR codes to increase the spatial fidelity of these mosaics. Familiar to smartphone users, we ask whether this mobile tool can encode mosaic survey plots in underwater space. If successful, these cross-depth mosaic images could be superior tools for tracking future community-level responses on the reefs of study. There is an urgent need for sound science to support new, buzz-worthy management guidelines, like conserving deep reefs for climate adaptation. JoinNational Geographic Explorer Clare Fieseler as she begins this research along a well-monitored reef environment on the Belizean Barrier Reef – which will catalyze a multiyear exploration of nearby deep reefs and expanding scope.

Live from Smithsonian Institution’sCarrie Bowe Caye MarineFieldStation, BelizeFeaturing: NG Explorer & EcologistClareFieseler
The rate at which climate change is heating up coral reefs has no past analog. Deep reefs (>25m) are often proposed as spots of resilience, seeds of hope. This study addresses holes in that argument. Our project tests a popular yet unproven rule of thumb: deeper reefs should be conserved, given their potential as 1) a thermal safe haven and 2) a reproductive source within the larger reef matrix. We leverage three innovations. New temperature experiments are made possible because of an untapped dataset -- the Caribbean's only cross-depth temperature monitoring project. We examine, through experimentation, whether depth-stratified microenvironments, newly revealed through this dataset, condition some corals to be more climate-hardy. Secondly, mosaic-imaging surveys will visualize an underwater reef slope by integrating multi-perspective, high-resolution still images. In addition to creating stunning visuals, mosaic images capture the broad ecological patterns we believe hold the key to assessing resilience. Finally, we experiment with QR codes to increase the spatial fidelity of these mosaics. Familiar to smartphone users, we ask whether this mobile tool can encode mosaic survey plots in underwater space. If successful, these cross-depth mosaic images could be superior tools for tracking future community-level responses on the reefs of study. There is an urgent need for sound science to support new, buzz-worthy management guidelines, like conserving deep reefs for climate adaptation. JoinNational Geographic Explorer Clare Fieseler as she begins this research along a well-monitored reef environment on the Belizean Barrier Reef – which will catalyze a multiyear exploration of nearby deep reefs and expanding scope.

Webinar: Underwater Sound in Relation to Dredging

The impacts of underwater sound on aquatic life have become a very important environmental issue. Like many other activities, the dredging process produces unde...

The impacts of underwater sound on aquatic life have become a very important environmental issue. Like many other activities, the dredging process produces underwater sound depending on the type of dredger, operation methods and so on. The knowledge about dredging induced sound and its effects has increased greatly in recent years and it grows by the day. After a brief introduction to the subject in this webinar participants will learn about: effects of sound on marine life; dredging sound; documented impacts; management of sound impacts via mitigation measures. The presentation will build on the work of the WODA Expert Group on UnderwaterSound.

The impacts of underwater sound on aquatic life have become a very important environmental issue. Like many other activities, the dredging process produces underwater sound depending on the type of dredger, operation methods and so on. The knowledge about dredging induced sound and its effects has increased greatly in recent years and it grows by the day. After a brief introduction to the subject in this webinar participants will learn about: effects of sound on marine life; dredging sound; documented impacts; management of sound impacts via mitigation measures. The presentation will build on the work of the WODA Expert Group on UnderwaterSound.

Seminar title: High-resolution benthic survey using Autonomous UnderwaterVehicles
Seminar type: CoralCoE seminar series
Presented by: StefanWilliamsDate: Thursday, 2nd of May2013Abstract: This talk will examine current developments in the area of benthic habitat mapping using Autonomous Underwater Vehicles (AUVs). An overview of Australia’sIntegratedMarine Observing System (IMOS) program will be given and the role that the IMOS AUVFacility is playing in conducting repeated surveys at sites around Australia will be described. We will provide a brief overview of developments in the areas of Simultaneous Localization and Mapping, 3D terrain reconstruction and management of the large volumes of image data being collected by these systems. We will show how these methods are being used to help characterize benthic habitats and to examine both broadscale patterns of biodiversity as well as detailed changes in these environments over time.
Biography: Dr. Stefan B. Williams is an Associate Professor and ARCFuture Fellow at the University of Sydney’s School of Aerospace, Mechanical and Mechatronic Engineering. He is a member of the Australian Centre for Field Robotics where he leads the Marine Robotics group. He is also the head of Australia’s Integrated Marine Observing System AUV Facility. His research interests include Simultaneous Localisation and Mapping in unstructured underwater environments, autonomous navigation and control and classification and clustering of large volumes of data collected by robotic systems. He received his PhD from the University of Sydney in 2002 and completed a Bachelor of Applied Science with first class honours in 1997 at the University of Waterloo, Canada.

Seminar title: High-resolution benthic survey using Autonomous UnderwaterVehicles
Seminar type: CoralCoE seminar series
Presented by: StefanWilliamsDate: Thursday, 2nd of May2013Abstract: This talk will examine current developments in the area of benthic habitat mapping using Autonomous Underwater Vehicles (AUVs). An overview of Australia’sIntegratedMarine Observing System (IMOS) program will be given and the role that the IMOS AUVFacility is playing in conducting repeated surveys at sites around Australia will be described. We will provide a brief overview of developments in the areas of Simultaneous Localization and Mapping, 3D terrain reconstruction and management of the large volumes of image data being collected by these systems. We will show how these methods are being used to help characterize benthic habitats and to examine both broadscale patterns of biodiversity as well as detailed changes in these environments over time.
Biography: Dr. Stefan B. Williams is an Associate Professor and ARCFuture Fellow at the University of Sydney’s School of Aerospace, Mechanical and Mechatronic Engineering. He is a member of the Australian Centre for Field Robotics where he leads the Marine Robotics group. He is also the head of Australia’s Integrated Marine Observing System AUV Facility. His research interests include Simultaneous Localisation and Mapping in unstructured underwater environments, autonomous navigation and control and classification and clustering of large volumes of data collected by robotic systems. He received his PhD from the University of Sydney in 2002 and completed a Bachelor of Applied Science with first class honours in 1997 at the University of Waterloo, Canada.

Amazing find at Burke Lake on my RaymarineDragonfly 7" fish finder - a man-made underwater fish attractor (slide show and over 30 amazing fish sonar images at the end of the video. click here (20m04s) - I have been studying tips to catch a Musky fish (10,000 cast fish).
One of the tips is to understand the lake. so, I studied the Burke lake's contour map and brought my Raymarine Dragonfly 7" fish finder to the lake to study the underwater structure. Cliff, point and dropouts.
I have not found any videos on YOUTUBE to identify the underwater fish attractor at Burke Lake Park in Fairfax, Virginia at all, so enjoy watching it, subscribe more NEW AMAZING videos to come!!!
I found a HUGE man-made underwater fish attractor standing 6 feet tall in 10 feet of water from water column 4 feet deep to 10 feet deep using my GPS fish finder.
Please comment if you KNOW how many of these man-made fish structures are there in the lake. Tons of fish found around the fish habitat. The DownVision image by Raymarine is amazing.
I was on my NativeSlayer Propel 10 feet kayak. This amazing yak is powered by a bike Pedal instead of a hand Paddle. If you are a biker, then you will like it. If not, you may want to think twice before you invest in this yak. I get about 2 miles - 3 miles per hour speed from pedaling the yak. You can see my DIY gear track adaptor for rod holder and gear track mount for my Sonar GPS/Fish Finder.
Virginia state burke lake website does state that they put fish attractor in this 218 acres lake to give shelters for fish. Beware! Be Warned! BURKE LAKE is accessible for kayakers and boaters with Virginia fresh water fishing license or boat registration ONLY. Access permit is REQUIRED to enter Burke Lake. No sail boat or gas powered motor allowed. Only electric motor allowed but you do need valid registration with Virginia BoatDepartment, otherwise you may get tickets for violations. Get your license and registration ready before you take your yak or boat to Burke Lake.
Virginia state stock Muskie 2 per acre and walleye 100 per acre each year. If you catch a fish with fish tag, remove the tag from the fish and send it into Virgina state for $20 reward.
https://www.dgif.virginia.gov/waterbody/lake-burke/
Please subscribe for future videos, because I am investing in a high definition underwater camera with night vision and LED lights that can be turned on and off. I will use the underwater camera to get a close-up look of these man-made fish structure.

Amazing find at Burke Lake on my RaymarineDragonfly 7" fish finder - a man-made underwater fish attractor (slide show and over 30 amazing fish sonar images at the end of the video. click here (20m04s) - I have been studying tips to catch a Musky fish (10,000 cast fish).
One of the tips is to understand the lake. so, I studied the Burke lake's contour map and brought my Raymarine Dragonfly 7" fish finder to the lake to study the underwater structure. Cliff, point and dropouts.
I have not found any videos on YOUTUBE to identify the underwater fish attractor at Burke Lake Park in Fairfax, Virginia at all, so enjoy watching it, subscribe more NEW AMAZING videos to come!!!
I found a HUGE man-made underwater fish attractor standing 6 feet tall in 10 feet of water from water column 4 feet deep to 10 feet deep using my GPS fish finder.
Please comment if you KNOW how many of these man-made fish structures are there in the lake. Tons of fish found around the fish habitat. The DownVision image by Raymarine is amazing.
I was on my NativeSlayer Propel 10 feet kayak. This amazing yak is powered by a bike Pedal instead of a hand Paddle. If you are a biker, then you will like it. If not, you may want to think twice before you invest in this yak. I get about 2 miles - 3 miles per hour speed from pedaling the yak. You can see my DIY gear track adaptor for rod holder and gear track mount for my Sonar GPS/Fish Finder.
Virginia state burke lake website does state that they put fish attractor in this 218 acres lake to give shelters for fish. Beware! Be Warned! BURKE LAKE is accessible for kayakers and boaters with Virginia fresh water fishing license or boat registration ONLY. Access permit is REQUIRED to enter Burke Lake. No sail boat or gas powered motor allowed. Only electric motor allowed but you do need valid registration with Virginia BoatDepartment, otherwise you may get tickets for violations. Get your license and registration ready before you take your yak or boat to Burke Lake.
Virginia state stock Muskie 2 per acre and walleye 100 per acre each year. If you catch a fish with fish tag, remove the tag from the fish and send it into Virgina state for $20 reward.
https://www.dgif.virginia.gov/waterbody/lake-burke/
Please subscribe for future videos, because I am investing in a high definition underwater camera with night vision and LED lights that can be turned on and off. I will use the underwater camera to get a close-up look of these man-made fish structure.

ROV SuBastian Dive 099- North Tafu Eruption - Underwater Fire

This is the fifteenth ROV dive and will explore the back-arc spreading axis north of Tafu cone. We will visit two young eruption sites, one constrained by befor...

This is the fifteenth ROV dive and will explore the back-arc spreading axis north of Tafu cone. We will visit two young eruption sites, one constrained by before-and-after bathymetric surveys between 2010-2017, and the other between 2006-2009. We expect to see and sample young basalt lava and pyroclasts. There will also be opportunistic sampling vent fluids or biota if observed. More information on the expedition can be found here: https://schmidtocean.org/cruise/underwater-fire-studying-submarine-volcanoes-tonga/

This is the fifteenth ROV dive and will explore the back-arc spreading axis north of Tafu cone. We will visit two young eruption sites, one constrained by before-and-after bathymetric surveys between 2010-2017, and the other between 2006-2009. We expect to see and sample young basalt lava and pyroclasts. There will also be opportunistic sampling vent fluids or biota if observed. More information on the expedition can be found here: https://schmidtocean.org/cruise/underwater-fire-studying-submarine-volcanoes-tonga/

Understanding an Underwater Survey

One of our primary objectives here in the Philippines has been to establish a robust and on going marine habitat survey programme that collect the necessary information required to inform sustainable management plans. The need for information is critical in any attempt to ensure the sustainable use of the marine environment.
But what exactly is a an underwater survey... what does it look like? What do you do...? We realise that many people don't really know the answers to these questions.
Here we put together a short video that tries to give an insight... There is still plenty to be explained! But it sets the picture.
All out volunteers receive comprehensive training on the methods and techniques involved. You will be amazed how much you learn!

How to Conduct a Coral Reef Survey

A Look at the LivingOceanFoundation's UnderwaterSurvey Methods
Using the M/YGoldenShadow as a research platform, research scientists implement standardized protocols to map, characterize, and evaluate coral reefs. The research involves comparing coral reefs across gradients of biodiversity, oceanographic conditions and human pressures to determine their status and major threats, and to identify key factors that enhance their health and resilience.
The LivingOceans Foundation looks at three main components when characterizing the health of a reef:
• We look at the fish (Fish Census);
• We look at what's on the bottom—that includes corals and other things (Benthic Survey); and
• We look at the corals (Belt Transect).
By learning how to conduct these types of surveys, you can make your own observations about aquatic resources near you. You may not live near a coral reef, but you can still use these methods to measure other important plants and animals that exist in habitats close to your home or school.

1:21

Hearing seismic surveying while underwater

Spearfishing off Cavo Greco,Cyprus can hear the Turkish ship "Barbaros" carrying out seism...

Hearing seismic surveying while underwater

Spearfishing off CavoGreco,Cyprus can hear the Turkish ship "Barbaros" carrying out seismic surveys (illegally breaching the territorial waters of Cyprus). You can hear the first sound waves fired at 0:21 and subsequently every 10 seconds after that.
Definition of seismic surveying from wikipedia:
"Traditional marine seismic surveys are conducted using specially-equipped vessels that tow one or more cables containing a series of hydrophones at constant intervals....The seismic source, usually an airgun but other sources are available, is also deployed underneath the surface of the water and is located between the vessel and the first receiver. 2 sources are often used in order to achieve a fast rate of shooting....and the source is typically fired every 15 or 20 seconds.
http://en.wikipedia.org/wiki/File:Diagram_of_a_marine_seismic_survey.png

Underwater surveys of the northern Great Barrier Reef during the 2016 coral bleaching event

Underwater surveys show that the reef is more than 60% bleached (white/pink colonies), matching the extent of bleaching detected by aerial surveys in March 2016. MORE INFORMATION BELOW.
On 29th March 2016, aerial surveys of more than 500 coral reefs from Cairns to Papua New Guinea revealed that the most pristine section of the Great Barrier Reef experienced the worst mass bleaching event in its history, with the overwhelming majority of reefs being ranked in the most severe bleaching category. The surveys were conducted by ProfTerry Hughes from the ARCCentre of Excellence for Coral Reef Studies, convenor of the NationalCoral Bleaching Taskforce, and JamesKerry, project manager of the taskforce. Aerial surveys were completed with underwater survey or "ground truthing" to verify the severity of the bleaching observed from above.
Footage is free to use for editorial purposes but MUST be credited ARC Centre of Excellence for Coral Reef Studies / Andreas Dietzel.
---
What is coral bleaching? How does it affect the Great Barrier Reef?
http://www.coralcoe.org.au/resources/for-managers/coral-bleaching-and-the-great-barrier-reef
---
Hot news on the 2016 coral bleaching event:
20 April 2016: Only 7% of the Great Barrier Reef has avoided coral bleaching
http://www.coralcoe.org.au/media-releases/only-7-of-the-great-barrier-reef-has-avoided-coral-bleaching
15 April 2016: Great Barrier Reef risks losing tolerance to bleaching events
http://www.coralcoe.org.au/media-releases/great-barrier-reef-risks-losing-tolerance-to-bleaching-events
05 April 2016: National Coral Taskforce unleashes an armada of experts
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-unleashes-an-armada-of-experts
29 March 2016: Coral Bleaching Taskforce documents most severe bleaching on record
http://www.coralcoe.org.au/media-releases/coral-bleaching-taskforce-documents-most-severe-bleaching-on-record
21 March 2016: Scientist witnesses severe coral bleaching
http://www.coralcoe.org.au/media-releases/scientist-witnesses-severe-coral-bleaching
14 March 2016: National Coral Taskforce puts plan into effect as bleaching intensifies
http://www.coralcoe.org.au/media-releases/national-coral-taskforce-puts-plan-into-effect-as-bleaching-intensifies
01 March 2016: National Coral Bleaching Taskforce keeping a close watch on the Reef
http://www.coralcoe.org.au/media-releases/national-coral-bleaching-taskforce-keeping-a-close-watch-on-the-reef

3:16

Underwater Survey Transect

Two science divers (Chelsea and Alex) from California State University - Monterey Bay cond...

Underwater Survey Transect

Two science divers (Chelsea and Alex) from California State University - Monterey Bay conducting a visual survey transect near the AquariusUnderwaterHabitat at 60'. For this project several divers and aquanauts were looking for and recording all social foraging events (when several fish forage for food together, whether from same species or mixed species) including the number of each species of fish involved, within a set distance from the transect line. This research was conducted as part of the Aquarius 2010 "If Reefs Could Talk" mission.

2:40

Offshore Seismic Surveying

Some of the richest energy reserves in the world are just off our US shores waiting to be ...

Offshore Seismic Surveying

Some of the richest energy reserves in the world are just off our US shores waiting to be discovered in a government owned area lying just 3 - 200 miles out to sea. An advanced exploration technique called seismic surveying is the first step to unlock this precious resource needed to ensure America's energy security.

3:32

Innovative 3D underwater survey by ROV 3D

It is now possible to see the underwater world in every detail thanks to the 3D ROV which ...

Innovative 3D underwater survey by ROV 3D

It is now possible to see the underwater world in every detail thanks to the 3D ROV which is being deployed in the CalanqueNational Park, in the Mediterranean Sea, near the south of France.
The Park and other marine protected areas joined hands with Comex, a company specializing in underwater exploration and other underwater operations. Together they are developing a high definition 3D modeling technology.
In theCalanquesNational Parks, one of the objectives is to have a 3D model of protected marine habitats such as the canyons and underwater caves.
The 3D ROV will allow to do an inventory of the biodiversity around and have a benchmark to track any changes in order to adopt the appropriate measures of management.

1:57

pole Cam Use for Shallow Underwater Surveys

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in...

pole Cam Use for Shallow Underwater Surveys

Video outlining pole-cam to use for shallow underwater surveys. The pole-cam consists in a contour miniature HD camera with its underwater housing mounted on a telescopic pole with a clamp.
The equipment can be put together in minutes by any field personnel. The camera can be setup to take HD video (1080 or 720p) or a series 5 Megapixel pictures (up to one every second).

Portable Underwater Lidar System Equipment (PULSE)

Conventional lidar terrain mapping will not penetrate water by more than a few centimeters. Bathymetric lidar systems use a different and more complex technology to measure seabed topography in shallow waters. Such surveys are typically performed for beach replenishment studies, near-shore surveys, seafloor mapping, nautical chart updates, and coastal zone erosion monitoring. They are used in fields like oceanography, marine biology, oil and gas exploration, and coastal and reef management, as well as by the Coast Guard and the Armed Forces.
Airborne bathymetric lidar surveys use the interaction of different laser wavelengths with the seafloor to perform seabed profiling. But the lasers also interact with particles or sediments in suspension in the water column between the surface and the seabed. These interactions need to be considered when mapping the seabed, failing which errors in topographic elevations and hydrographic depths may occur.
INO has developed a submarine lidar to measure the reflectance of the seafloor and water column. The system is used to determine the reflectance of sea bottom so that their composition can be correlated with relative intensity data from aerial surveys. INO's lidar system helps to calibrate the results of airborne bathymetric surveys, increasing their accuracy and enhancing our understanding of the results. Use of bathymetric lidar systems is likely to increase in the future due to improvements in their functionality, so calibration of those systems is important to ensure accurate seabed topography data.
INO is working closely with INRS-ETE to test the maximum depth achievable and calibrate the system in the water. This lidar prototype has the potential to cover a range of 3 to 50 m underwater. The lidar submarine enclosure is currently carried by a zodiac and submerged while following airplanes doing aerial surveys. Future development of the lidar submarine system will include putting it in an Unmanned Underwater Vehicle (UUV) for independent measurements.
For more information : http://www.ino.ca/en-CA/Achievements/Description/project-p/portable-underwater-lidar-equipment.html

Underwater

Extent

Three quarters of the planet Earth is covered by water. A majority of the planet's solid surface is abyssal plain, at depths between 4,000 and 5,500 metres (13,100 and 18,000ft) below the surface of the oceans. The solid surface location on the planet closest to the centre of the orb is the Challenger Deep, located in the Mariana Trench at a depth of 10,924 metres (35,840ft). Although a number of human activities are conducted underwater—such as research, scuba diving for work or recreation, or even underwater warfare with submarines, this very extensive environment on planet Earth is hostile to humans in many ways and therefore little explored. But it can be explored by sonar, or more directly via manned or autonomous submersibles. The ocean floors have been surveyed via sonar to at least a coarse resolution; particularly-strategic areas have been mapped in detail, in the name of detecting enemy submarines, or aiding friendly ones, though the resulting maps may still be classified.

An officer from the Summit CountySheriff's Office holds the VideoRay Pro 4, the county's new remotely operated underwater vehicle to help with water search efforts, at Dillon Reservoir on Wednesday, May 23 ... A Summit County WaterRescue Team scuba diver follows the ROVunderwater during training exercises at Dillon Reservoir, Wednesday, May 23....

In 2008, 26-year-old Frisco resident Adam Brown fell overboard from a boat and drowned in Dillon Reservoir... The county graciously accepted the funds and purchased the sonar system for its search boats ... With diver safety, and Adam Brown's memory, firmly in mind, the county raised $60,000 from grants and donations to purchase the newest tool in its recovery arsenal – a remotely operated underwater vehicle ... ....

Deepest Part of The Oceans - Full Documentary HD

Measuring the GreatestOceanDepthThe Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. In 2010 the United StatesCenter for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters (36,070 feet) below sea level with an estimated vertical accuracy of ± 40 meters. If Mount Everest, the highest mountain on Earth, were placed at this location it would be covered by over one mile of water.
The first depth measurements in the Mariana Trench were made by the British survey ship HMS Challenger, which was used by the Royal Navy in 1875 to conduct research in the trench. The greatest depth that they recorded at that time was 8,184 meters (26,850 feet).
In 1951, another Royal Navy vessel, also named the "HMS Challenger," returned to the area for additional measurements. They discovered an even deeper location with a depth of 10,900 meters (35,760 feet) determined by echo sounding. The Challenger Deep was named after the Royal Navy vessel that made these measurements.
In 2009, sonar mapping done by researchers aboard the RV Kilo Moana, operated by the University of Hawaii, determined the depth to be 10,971 meters (35,994 feet) with a potential error of ± 22 meters. The most recent measurement, done in 2010, is the 10,994 meter ( ± 40 meter accuracy) depth reported at the top of this article, measured by the United States Center for Coastal & Ocean Mapping.

52:09

► Adventure Ocean Quest - Fragile Mediterranean (FULL Documentary)

The Mediterranean Sea is a world of impressive diversity where ocean sunfish and whales li...

► Adventure Ocean Quest - Fragile Mediterranean (FULL Documentary)

The Mediterranean Sea is a world of impressive diversity where ocean sunfish and whales live side by side, and colourful corals provide a home for smaller creatures. But human beings have left their mark here for thousands of years: ancient shipwrecks and fighter planes from the Second World War litter the ocean floor, while until recently raw sewage was fed straight into the sea. The impact has been devastating – today the Mediterranean is an ecosystem on the edge. But there is a glimmer of hope as measures to protect the sea from pollution and excessive disturbance are being put into place.
Sandrine Ruiton from the University of Marseille specialises in research on artificial reefs to build up the lost marine biodiversity near cities like Marseille, one of the Mediterranean’s busiest ports. Until recently it was responsible for seriously polluting the surrounding Mediterranean Sea. ChristianPetron himself has been instrumental in raising awareness of this ecosystem in dire straights. His own 30-year-old archive footage shows the extent of the pollution in graphic detail.
Both Sandrine Ruiton and Christian are involved in the hugely successful ‘PradoReef2006’ project, which is designed to repopulate the local waters by encouraging the colonisation of new reefs. Even old shipwrecks and fighter planes turned into artificial reefs and first indications offer grounds for cautious optimism.
But to be able to accurately assess the success of these artificial reefs, detailed population counts are absolutely essential. But their accuracy is questionable when carried out by divers with conventional equipment – reef creatures are notoriously shy and many are likely to hide at the approach of a noisy diver. So Sandrine Ruiton wants to find out if Frederic can achieve more accurate population counts on these fragile reefs by being less intrusive. His ability to move and behave almost like a fish without any cumbersome diving equipment allows him closer access without frightening the wildlife off.
His first destination is the wreck of an freighter, sunk after world-war 2, closely followed and observed by Christian Petron. The collection of creatures found here are delicate and extremely cautious. But this dive also poses real challenges for Fred: diving in a wreck brings particular dangers with it, especially for a freediver. Nevertheless, he is determined to press on with his attempt to evaluate the state of Mediterranean marine wildlife.
The artificial reef population surveys are only part of the reason why Frederic has come to the Mediterranean. He also works together with Dr. Pierre Chevaldonne, a scientist at the ‘StationMarine D’Endoume/Marseille’. Both are interested in an underwater cave that could be invaluable to modern science.
Organisms and animals that are usually associated with much deeper waters thrive in this deep dark cave. In particular a collection of sponges could be of interest, not just because they provide an endless supply of biomarkers that are very sensitive to environmental changes: they are also highly relevant for modern medicine. Sponges are known to provide AZT (Azido-Thymidin) – currently one of the most used medications for the treatment of AIDS and in the fight against cancer. The sponges generate these substances as dangerous chemical weapons against predators or as a defence against harmful bacteria.
The research team is renowned for their work on sponges, but the breathing bubbles emitted by conventional drivers would collect at the cave ceiling and gradually kill the cave dwellers.
But Frederic’s approach is very different. By holding his breath, he can ensure that the sponges and other cave organisms are not threatened. He is able to explore the cave in detail and report his findings and bring samples back to the research group. This research can provide ground-breaking insights into modern medicine, as well as giving an indication of the health of the Mediterranean waters by examining the sponges’ biomarkers.
Together, Frederic’s involvement in the artificial reef projects as well as the underwater cave exploration are extremely valuable contributions to the quest to document and protect the diversity of Mediterranean marine wildlife. He is in a unique position to access and approach the wildlife, that cannot be replicated by using conventional diving methods, and as such is an incredible opportunity for the scientists to gain a new window to the underwater life of the Mediterranean.

22:14

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update...

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170

underwater fish attractor - what does it look like in 3D sonar and side scan sonar? update 3.3.170
In this video you will see what a 6 feet tall fish attractor look like in 10 feet of Burke Lake Park water, Recorded from RaymarineAxiom 9" multifunction display with RV100 3D transducer 4 in 1.
The newest software Update 3.3.170 released in January 2018 is showing the 7 rainbow color depth side bar every 50 feet and is repeating itself every 50 feet. So, 0 to 7 feet for Violet, Indigo 7-14 feet, 14-21 Blue, 21-28 green, Yellow 28-35, Orange 35-42, Red 42-50 feet. The colors repeat themselves when the depth is over 50 feet.

1:18:17

What Remote Viewers Found in Atlantis will Astound You

Remote viewers have found something astounding based on Google Earth surveys of anomalous ...

What Remote Viewers Found in Atlantis will Astound You

Remote viewers have found something astounding based on Google Earth surveys of anomalous underwater patterns found in two locations: the Atlantic waters off Morocco and Spain; and another off the coast of Antarctica. Learn the surprising details of how these two locations connect in a disaster believed to be the destruction of Atlantis. The remote viewers say that Atlantean society’s buildings were huge and were mostly built beneath ground. So now these huge buildings still exist, under the ocean floor and a bit of sediment. The RV’ers saw that some of the machinery was still intact and is still working to this day! However, they did not see that there are any people inside the buildings.
Courtney said that the Atlantean society was more than 100 years more advanced than ours. Their biggest problem was that their scientists were doing things (experiments and such) in secrecy instead of in view of the public and officials. He called this “cloaked science”, and in fact states that we are doing the exact same thing now. He says that we are the descendants of the Atlanteans.

Submarines & Diving playlist: https://www.youtube.com/watch?v=abynac4hNYE&list=PL1C388CF94E3C0F45
US NavyTrainingFilm playlist: https://www.youtube.com/playlist?list=PLA40407C12E5E35A7
more at http://quickfound.net/links/military_news_and_links.htmlSubmarineSound and Vibration Measurement: Procedures for Airborne and Structureborne Noise Surveys.
US Navy Training Film MN-10312-D
Originally a public domain film from the US Navy, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Sound_level_meter
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A sound level meter is used for acoustic (sound that travels through air) measurements. It is commonly a hand-held instrument with a microphone. The diaphragm of the microphone responds to changes in air pressure caused by sound waves. That is why the instrument is sometimes referred to as a Sound Pressure Level (SPL) Meter. This movement of the diaphragm, i.e. the sound pressure deviation (pascal Pa), is converted into an electrical signal (volts V).
A microphone is distinguishable by the voltage value produced when a known, constant sound pressure is applied. This is known as the microphone sensitivity. The instrument needs to know the sensitivity of the particular microphone being used. Using this information, the instrument is able to accurately convert the electrical signal back to a sound pressure, and display the resulting sound pressure level (decibels dB SPL).
Sound level meters are commonly used in noise pollution studies for the quantification of different kinds of noise, especially for industrial, environmental and aircraft noise. The current international standard that specifies sound level meter functionality and performances is the IEC 61672-1:2013. However, the reading from a sound level meter does not correlate well to human-perceived loudness, which is better measured by a loudness meter. Specific loudness is a compressive nonlinearity that depends on level and also frequency, which can be calculated in a number of different ways...
https://en.wikipedia.org/wiki/Sound_intensity
Sound intensity also known as acoustic intensity is defined as the power carried by sound waves per unit area in a direction perpendicular to that area. The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2). One application is the noise measurement of sound intensity in the air at a listener's location as a sound energy quantity.
Sound intensity is not the same physical quantity as sound pressure. Hearing is directly sensitive to sound pressure which is related to sound intensity. In consumer audio electronics, the level differences are called "intensity" differences, but sound intensity is a specifically defined quantity and cannot be sensed by a simple microphone. The rate at which sound energy passes through a unit area held perpendicular to the direction of propagation of sound waves is called intensity of sound...
https://en.wikipedia.org/wiki/Anti-submarine_warfare
Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage or destroy enemy submarines.
Successful anti-submarine warfare depends on a mix of sensor and weapon technology, training, and experience. Sophisticated sonar equipment for first detecting, then classifying, locating and tracking the target submarine is a key element of ASW. To destroy submarines both the torpedo and mine are used, launched from air, surface and underwater platforms...

Hangout With Explorer Clare Fieseler

Live from Smithsonian Institution’sCarrie Bowe Caye MarineFieldStation, BelizeFeaturing: NG Explorer & EcologistClareFieseler
The rate at which climate change is heating up coral reefs has no past analog. Deep reefs (>25m) are often proposed as spots of resilience, seeds of hope. This study addresses holes in that argument. Our project tests a popular yet unproven rule of thumb: deeper reefs should be conserved, given their potential as 1) a thermal safe haven and 2) a reproductive source within the larger reef matrix. We leverage three innovations. New temperature experiments are made possible because of an untapped dataset -- the Caribbean's only cross-depth temperature monitoring project. We examine, through experimentation, whether depth-stratified microenvironments, newly revealed through this dataset, condition some corals to be more climate-hardy. Secondly, mosaic-imaging surveys will visualize an underwater reef slope by integrating multi-perspective, high-resolution still images. In addition to creating stunning visuals, mosaic images capture the broad ecological patterns we believe hold the key to assessing resilience. Finally, we experiment with QR codes to increase the spatial fidelity of these mosaics. Familiar to smartphone users, we ask whether this mobile tool can encode mosaic survey plots in underwater space. If successful, these cross-depth mosaic images could be superior tools for tracking future community-level responses on the reefs of study. There is an urgent need for sound science to support new, buzz-worthy management guidelines, like conserving deep reefs for climate adaptation. JoinNational Geographic Explorer Clare Fieseler as she begins this research along a well-monitored reef environment on the Belizean Barrier Reef – which will catalyze a multiyear exploration of nearby deep reefs and expanding scope.

Webinar: Underwater Sound in Relation to Dredging

The impacts of underwater sound on aquatic life have become a very important environmental issue. Like many other activities, the dredging process produces underwater sound depending on the type of dredger, operation methods and so on. The knowledge about dredging induced sound and its effects has increased greatly in recent years and it grows by the day. After a brief introduction to the subject in this webinar participants will learn about: effects of sound on marine life; dredging sound; documented impacts; management of sound impacts via mitigation measures. The presentation will build on the work of the WODA Expert Group on UnderwaterSound.

2016 04 13 10 00 Underwater Laser Scanning...

The World's Largest Coral Reef Survey, The Global ...

Latest News for: underwater surveys

An officer from the Summit CountySheriff's Office holds the VideoRay Pro 4, the county's new remotely operated underwater vehicle to help with water search efforts, at Dillon Reservoir on Wednesday, May 23 ... A Summit County WaterRescue Team scuba diver follows the ROVunderwater during training exercises at Dillon Reservoir, Wednesday, May 23....

In 2008, 26-year-old Frisco resident Adam Brown fell overboard from a boat and drowned in Dillon Reservoir... The county graciously accepted the funds and purchased the sonar system for its search boats ... With diver safety, and Adam Brown's memory, firmly in mind, the county raised $60,000 from grants and donations to purchase the newest tool in its recovery arsenal – a remotely operated underwater vehicle ... ....

And "the Holy Grail of shipwrecks" stayed underwater, undiscovered for more than 300 years. Enter a tiny submersible robot named Remus 6000 - packed with sensors and cameras and capable of diving 4 miles underwater - that has discovered the centuries-old final resting place of the sunken ship. The unmanned underwater vehicle, operated by Woods Hole......

&nbsp; ... The oil spill was the result of a burst underwater pipeline belonging to the company that also triggered a fire, leading to the death of five fishermen ... Yustan said IS had worked with Pertamina for decades and that he was responsible for controlling the pump system of underwater pipelines ... ... (hol/ebf). . Topics .. ....